In October 1989 we flew a trial at Boscombe to increase the maximum take-off weight of the Phantom from 58 000 lbs to 60 000 lbs. We used a FG1 that had a high basic weight and flew with 3 tanks and 4 x 1000 lb bombs. I suspect that we must have still had the jettison facility available for the bombs (but cannot be certain), and as it was a standard squadron airframe that capability must still have existed in the fleet even then.